ATE103261T1 - PROCESS FOR GENERATING CHLORINE DIOXIDE. - Google Patents
PROCESS FOR GENERATING CHLORINE DIOXIDE.Info
- Publication number
- ATE103261T1 ATE103261T1 AT89850354T AT89850354T ATE103261T1 AT E103261 T1 ATE103261 T1 AT E103261T1 AT 89850354 T AT89850354 T AT 89850354T AT 89850354 T AT89850354 T AT 89850354T AT E103261 T1 ATE103261 T1 AT E103261T1
- Authority
- AT
- Austria
- Prior art keywords
- reaction vessel
- formic acid
- chlorine dioxide
- content
- gaseous
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B11/00—Oxides or oxyacids of halogens; Salts thereof
- C01B11/02—Oxides of chlorine
- C01B11/022—Chlorine dioxide (ClO2)
- C01B11/023—Preparation from chlorites or chlorates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Abstract
A process for production of chlorine dioxide by reacting in a reaction vessel an alkali metal chlorate, a mineral acid and methanol as a reducing agent in proportions to generate chlorine dioxide in a reaction medium maintained at a temperature from about 50 DEG C to about 100 DEG C and at an acidity within the interval from about 2 to about 11 N and subjected to a subatmospheric pressure. Thereby water is evaporated and a mixture of chlorine dioxide, water vapour and gaseous by-products is withdrawn from an evaporation region in the reaction vessel. The alkali metal sulphate is precipitated in a crystallization region in the reaction vessel. The content of formic acid in the reaction vessel is increased by addition of formic acid to a content of formic acid exceeding about 0.3 M. The gaseous by-products are condensed to obtain formic acid and the content of formic acid in the reaction vessel is increased by recirculation of the condensate.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8803817A SE463671B (en) | 1988-10-25 | 1988-10-25 | PROCEDURE FOR PREPARATION OF CHLORIDE Dioxide |
EP89850354A EP0366636B1 (en) | 1988-10-25 | 1989-10-17 | A process for the production of chlorine dioxide |
Publications (1)
Publication Number | Publication Date |
---|---|
ATE103261T1 true ATE103261T1 (en) | 1994-04-15 |
Family
ID=20373736
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT89850354T ATE103261T1 (en) | 1988-10-25 | 1989-10-17 | PROCESS FOR GENERATING CHLORINE DIOXIDE. |
Country Status (11)
Country | Link |
---|---|
US (1) | US4978517A (en) |
EP (1) | EP0366636B1 (en) |
JP (1) | JPH075283B2 (en) |
AT (1) | ATE103261T1 (en) |
BR (1) | BR8905386A (en) |
CA (1) | CA1333519C (en) |
DE (1) | DE68914090D1 (en) |
FI (1) | FI89474C (en) |
NZ (1) | NZ231088A (en) |
PT (1) | PT92085B (en) |
SE (1) | SE463671B (en) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5348683A (en) * | 1990-02-06 | 1994-09-20 | Olin Corporation | Chloric acid - alkali metal chlorate mixtures and chlorine dioxide generation |
US5242554A (en) * | 1990-02-06 | 1993-09-07 | Olin Corporation | Electrolytic production of chloric acid and sodium chlorate mixtures for the generation of chlorine dioxide |
US5322598A (en) * | 1990-02-06 | 1994-06-21 | Olin Corporation | Chlorine dioxide generation using inert load of sodium perchlorate |
SE9002262D0 (en) * | 1990-06-27 | 1990-06-27 | Eka Nobel Ab | PROCEDURE FOR THE PREPARATION OF CHLOROXIDE |
US5205995A (en) * | 1991-04-22 | 1993-04-27 | Sterling Canada Inc. | Metathesis of acidic by-product of chlorine dioxide generating apparatus |
US5116595A (en) * | 1991-04-22 | 1992-05-26 | Tenneco Canada Inc. | Metathesis of acidic by-product of chlorine dioxide generating process |
CA2148462C (en) * | 1992-11-09 | 1999-08-31 | Herbert C. Scribner | Metathesis of acidic by-product of chlorine dioxide generating process |
US5399332A (en) * | 1993-10-20 | 1995-03-21 | Sterling Canada, Inc. | Dynamic leaching procedure for metathesis |
US5599518A (en) * | 1994-12-01 | 1997-02-04 | Olin Corporation | Catalytic process for chlorine dioxide generation from chloric acid |
US6322768B1 (en) | 1998-09-29 | 2001-11-27 | International Paper Company | Recovery of chlorine dioxide from gas streams |
US6287533B1 (en) | 1999-09-20 | 2001-09-11 | Mohammed N. I. Khan | Production of chlorine dioxide by chemical reduction of ammonium chlorate in aqueous acidic solution |
US6306281B1 (en) | 1999-11-30 | 2001-10-23 | Joseph Matthew Kelley | Electrolytic process for the generation of stable solutions of chlorine dioxide |
US6855294B2 (en) | 2000-11-22 | 2005-02-15 | Resonance, Inc. | Apparatus and methods for efficient generation of chlorine dioxide |
WO2005080262A1 (en) * | 2004-02-23 | 2005-09-01 | Akzo Nobel N.V. | Process for production of chlorine dioxide |
CN100471791C (en) * | 2004-02-23 | 2009-03-25 | 阿克佐诺贝尔公司 | Process for production of chlorine dioxide |
JP2005330159A (en) * | 2004-05-21 | 2005-12-02 | Mitsubishi Gas Chem Co Inc | Method for producing chlorine-free bleaching agent for chemical pulp from sodium chloride |
WO2006062455A1 (en) * | 2004-12-06 | 2006-06-15 | Akzo Nobel N.V. | Chemical process and apparatus |
EP2443059B1 (en) * | 2009-06-16 | 2015-08-26 | Akzo Nobel N.V. | Process for the production of chlorine dioxide |
UY32927A (en) | 2009-10-12 | 2011-03-31 | Akzo Nobel Chemicals Int Bv | PROCESS FOR THE PRODUCTION OF CHLORINE DIOXIDE |
FI122623B (en) * | 2009-10-30 | 2012-04-30 | Kemira Oyj | Process for the preparation of chlorine dioxide |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3864456A (en) * | 1964-08-13 | 1975-02-04 | Electric Reduction Co | Manufacture of chlorine dioxide, chlorine and anhydrous sodium sulphate |
FR1471370A (en) * | 1965-03-12 | 1967-03-03 | Hooker Chemical Corp | Chlorine dioxide production |
US3933988A (en) * | 1966-10-24 | 1976-01-20 | Hooker Chemicals & Plastics Corporation | Method of simultaneously producing chlorine dioxide and a sulfate salt |
US3563702A (en) * | 1968-03-05 | 1971-02-16 | Hooker Chemical Corp | Production of chlorine dioxide |
NL7501253A (en) * | 1974-02-15 | 1975-08-19 | Basf Ag | METHOD FOR THE WINNING OF MERIC ACID. |
US4145401A (en) * | 1976-03-19 | 1979-03-20 | Erco Industries Limited | High efficiency chlorine dioxide production at low acidity with methanol addition |
CA1080433A (en) * | 1976-03-19 | 1980-07-01 | Erco Industries Limited | High efficiency chlorine dioxide production at low acidity |
SE425322B (en) * | 1976-05-11 | 1982-09-20 | Kemanobel Ab | PROCEDURE FOR THE PREPARATION OF ALKALIMETAL OR EARTHALKALIMETAL CHLORITE |
US4465658A (en) * | 1983-06-13 | 1984-08-14 | Erco Industries Limited | Chlorine dioxide process |
US4473540A (en) * | 1983-07-07 | 1984-09-25 | Erco Industries Limited | High efficiency chlorine dioxide process |
DE3522934A1 (en) * | 1985-06-27 | 1987-01-08 | Thomson Brandt Gmbh | VIDEO RECORDER |
SE460046B (en) * | 1987-03-27 | 1989-09-04 | Eka Nobel Ab | PROCEDURE FOR PREPARATION OF CHLORIDE Dioxide |
-
1988
- 1988-10-25 SE SE8803817A patent/SE463671B/en not_active IP Right Cessation
-
1989
- 1989-02-28 US US07/316,879 patent/US4978517A/en not_active Expired - Lifetime
- 1989-09-29 CA CA000615234A patent/CA1333519C/en not_active Expired - Lifetime
- 1989-10-17 EP EP89850354A patent/EP0366636B1/en not_active Expired - Lifetime
- 1989-10-17 AT AT89850354T patent/ATE103261T1/en not_active IP Right Cessation
- 1989-10-17 DE DE89850354T patent/DE68914090D1/en not_active Expired - Lifetime
- 1989-10-18 JP JP1269261A patent/JPH075283B2/en not_active Expired - Lifetime
- 1989-10-19 NZ NZ231088A patent/NZ231088A/en unknown
- 1989-10-23 FI FI895028A patent/FI89474C/en active IP Right Grant
- 1989-10-23 BR BR898905386A patent/BR8905386A/en not_active IP Right Cessation
- 1989-10-24 PT PT92085A patent/PT92085B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE68914090D1 (en) | 1994-04-28 |
CA1333519C (en) | 1994-12-20 |
FI89474B (en) | 1993-06-30 |
BR8905386A (en) | 1990-05-22 |
NZ231088A (en) | 1991-08-27 |
FI895028A0 (en) | 1989-10-23 |
JPH075283B2 (en) | 1995-01-25 |
SE8803817D0 (en) | 1988-10-25 |
SE8803817L (en) | 1990-04-26 |
JPH02157102A (en) | 1990-06-15 |
SE463671B (en) | 1991-01-07 |
PT92085A (en) | 1990-04-30 |
EP0366636A1 (en) | 1990-05-02 |
EP0366636B1 (en) | 1994-03-23 |
FI89474C (en) | 1993-10-11 |
PT92085B (en) | 1995-08-09 |
US4978517A (en) | 1990-12-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
UEP | Publication of translation of european patent specification | ||
EELA | Cancelled due to lapse of time |